The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 16, 1996
Filed:
May. 22, 1995
International Business Machines Corporation, Armonk, NY (US);
Abstract
A color image region management system suitable for retrieving a region having a specified color. Color class is determined for each picture element of image data in which the color data of each picture element is expressed by a trichromatic system. In the trichromatic system, it is determined to which color class the color of the picture element belongs of a plurality of color classes divided on the basis of a perceptual color system. There is a color index memory for constructing tree structure data reaching a root node with blocks each including at least one picture element as a leaf node, and calculating, for each node in the tree structure data and for each color class in regards to the picture elements included in the node, the frequency of picture elements having a color belonging to the color class. The calculated frequency of the picture elements is stored as a color index for each color class.